Question: How do stem cells naturally contribute to tissue maintenance and repair in the body? What mechanisms or checkpoints keep stem cell division under control? How are scientists currently exploring the use of stem cells for regenerative medicine, and what potential benefits do these therapies offer? What ethical questions arise when humans attempt to manipulate or engineer stem cells for medical use? In your response, connect your ideas to real-life examples (i.e., stem cell therapies for spinal cord injury, diabetes, or heart disease), and consider both the promise and the ethical challenges of these emerging technologies. Need Assignment Help?